CN218272540U - Emission reference measurement system of vector network analyzer - Google Patents
Emission reference measurement system of vector network analyzer Download PDFInfo
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- CN218272540U CN218272540U CN202222387948.XU CN202222387948U CN218272540U CN 218272540 U CN218272540 U CN 218272540U CN 202222387948 U CN202222387948 U CN 202222387948U CN 218272540 U CN218272540 U CN 218272540U
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Abstract
The utility model relates to a vector network analysis appearance transmission is referred to measurement system, including transmitting system, reference system and measurement system, transmitting system includes first frequency multiplier, power amplifier, second frequency multiplier and isolator, and the reference system includes the second mixer, and measurement system includes first frequency mixer and third frequency multiplier. The utility model relates to a vector network analyzer emission reference measurement system, which can reduce the influence of measurement precision on system error; through the connection relation between the optical coupler and the three systems, on one hand, the insertion loss can be reduced, the isolation degree between the ports can be increased, and on the other hand, the leakage of a transmitting signal of a main path output port of the coupler to an output end of the coupler can be reduced.
Description
Technical Field
The utility model relates to a vector network analyzer technical field that is correlated with especially relates to a vector network analyzer transmission reference measurement system.
Background
The vector network analyzer is a kind of electromagnetic wave energy testing equipment. It can measure the amplitude of various parameters of single-port network, and can measure phase position. The principle and the application force of the vector network analyzer directly depend on the dynamic range index of the system. The vector network analyzer is provided with a signal source generator, and can perform frequency scanning on a frequency band. The single port measurement applies an excitation signal to the port and by measuring the amplitude and phase of the reflected signal, the impedance or reflection condition can be determined. For a two-port measurement, the transmission parameters can also be measured.
At present, the measurement accuracy of most vector network analyzer extension modules is derived from systematic errors, random errors and drift errors, and most of errors are derived from the systematic errors, and the errors affect the transmission and transmission measurement of the modules. For example, a common vector network analyzer extension module in the prior art includes a transmission reference module and a measurement receiving module, a part of input signals in a directional coupler in the measurement receiving module may leak to an output end of the coupler, and a small number of transmission signals may also be transmitted to an output end of the coupler from a main output port of the coupler, which brings an uncertainty factor to a measurement result.
In view of the above-mentioned drawbacks, the present designer is actively making research and innovation to create a vector network analyzer emission reference measurement system, which has industrial value.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims at providing a vector network analyzer transmission reference measurement system.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the transmitting system comprises a first frequency multiplier, a power amplifier, a second frequency multiplier and an isolator, the reference system comprises a second frequency mixer, the measurement system comprises a first frequency mixer and a third frequency multiplier, the output end of the first frequency multiplier is connected with the input end of the power amplifier, the output end of the power amplifier is connected with the input end of the second frequency multiplier, the output end of the second frequency multiplier is connected with the input end of the isolator, the output end of the isolator is connected with the input end of an optical coupler, the first coupling end of the optical coupler is connected with the first input end of the second frequency mixer, the first output end of a local oscillator power divider is connected with the second input end of the second frequency mixer, the second coupling end of the optical coupler is connected with the first input end of the first frequency mixer, the second output end of the local oscillator power divider is connected with the input end of the third frequency multiplier, and the output end of the third frequency multiplier is connected with the second input end of the first frequency mixer.
As a further improvement of the utility model, the measuring system further comprises a low noise amplifier, and the output end of the first frequency mixer is connected with the input end of the low noise amplifier.
As a further improvement of the present invention, the optical coupler is a Faraday rotary coupler.
As a further improvement of the present invention, the first mixer is a subharmonic mixer.
As a further improvement of the present invention, the second mixer is a higher harmonic mixer.
Borrow by above-mentioned scheme, the utility model discloses at least, have following advantage:
the utility model relates to a vector network analyzer emission reference measurement system, which can reduce the influence of measurement precision on system error; through the connection relation between the optical coupler and the three systems, on one hand, the insertion loss can be reduced, the isolation degree between the ports can be increased, and on the other hand, the leakage of the transmission signal of the main path output port of the coupler to the output end of the coupler can be reduced.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a vector network analyzer emission reference measurement system of the present invention;
fig. 2 is a schematic diagram of the structure of the optical coupler of fig. 1.
In the drawings, the meanings of the reference numerals are as follows.
1 first frequency multiplier 2 power amplifier
3 second frequency multiplier 4 isolator
5 optical coupler 6 first mixer
7 third frequency multiplier 8 local oscillator power divider
9 second mixer 10 low noise amplifier
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In order to make the technical solutions of the present invention better understood, the attached drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
As shown in figures 1-2 of the drawings,
a vector network analyzer emission reference measurement system comprises an emission system, a reference system and a measurement system, wherein the emission system comprises a first frequency multiplier 1, a power amplifier 2, a second frequency multiplier 3 and an isolator 4, the reference system comprises a second frequency mixer 9, the measurement system comprises a first frequency mixer 6 and a third frequency multiplier 7, an output end of the first frequency multiplier 1 is connected with an input end of the power amplifier 2, an output end of the power amplifier 2 is connected with an input end of the second frequency multiplier 3, an output end of the second frequency multiplier 3 is connected with an input end of the isolator 4, an output end of the isolator 4 is connected with an input end of an optical coupler 5, a first coupling end of the optical coupler 5 is connected with a first input end of the second frequency mixer 9, a first output end of a local oscillator power divider 8 is connected with a second input end of the second frequency mixer 9, a second coupling end of the optical coupler 5 is connected with a first input end of the first frequency mixer 6, a second output end of the local oscillator power divider 8 is connected with an input end of the third frequency multiplier 7, and an output end of the third frequency multiplier 7 is connected with a second input end of the first frequency mixer 6.
Wherein the measuring system further comprises a low noise amplifier 10, and the output of the first mixer 6 is connected to the input of the low noise amplifier 10.
Wherein, the types of the above parts are selected, and the optical coupler 5 is a Faraday rotation coupler. The first mixer 6 is a subharmonic mixer. The second mixer 9 is a higher harmonic mixer.
The utility model relates to a vector network analyzer transmission reference measurement system's working process or theory of operation brief:
a vector network analyzer emission reference measurement system comprises an emission system, a reference system and a measurement system.
Wherein the content of the first and second substances,
the transmitting system is that a fundamental wave signal passes through a first frequency multiplier 1, an obtained signal passes through a power amplifier 2, then passes through a second frequency multiplier 3, an obtained signal passes through an isolator 4, and finally passes through an optical coupler 5 to obtain a transmitting signal;
a first output end of the local oscillator power divider 8 is connected to a second input end (local oscillator end) of a second mixer 9 of the reference system, and a signal coupled by the optical coupler 5 is connected to a first input end (radio frequency end) of the second mixer 9;
the second output end of the local oscillator power divider 8 is connected to a third frequency multiplier 7 of the measurement system, a signal output by the third frequency multiplier 7 is connected to the second input end (local oscillator end) of the first frequency mixer 6, and a signal reflected by a signal output by the transmitting end and coupled by the optical coupler 5 is connected to the first input end (radio frequency end) of the first frequency mixer 6.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly referring to the number of technical features being indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected: either mechanically or electrically: the terms may be directly connected or indirectly connected through an intermediate medium, or may be a communication between two elements.
The above description is only a preferred embodiment of the present invention, and should not be used to limit the present invention, it should be noted that, for those skilled in the art, without departing from the technical principle of the present invention, a plurality of improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (5)
1. A vector network analyzer emission reference measurement system comprises an emission system, a reference system and a measurement system, characterized in that the transmitting system comprises a first frequency multiplier (1), a power amplifier (2), a second frequency multiplier (3) and an isolator (4), the reference system comprises a second mixer (9), the measurement system comprises a first mixer (6) and a third frequency multiplier (7), the output end of the first frequency multiplier (1) is connected with the input end of the power amplifier (2), the output end of the power amplifier (2) is connected with the input end of the second frequency multiplier (3), the output end of the second frequency multiplier (3) is connected with the input end of the isolator (4), the output end of the isolator (4) is connected with the input end of the optical coupler (5), a first coupling end of the optical coupler (5) is connected with a first input end of a second frequency mixer (9), a first output end of the local oscillator power divider (8) is connected with a second input end of the second frequency mixer (9), the second coupling end of the optical coupler (5) is connected with the first input end of the first mixer (6), the second output end of the local oscillator power divider (8) is connected with the input end of the third frequency multiplier (7), the output end of the third frequency multiplier (7) is connected with the second input end of the first mixer (6).
2. The vector network analyzer transmitted reference measurement system of claim 1, further comprising a low noise amplifier (10), wherein the output of the first mixer (6) is connected to the input of the low noise amplifier (10).
3. The vector network analyzer emission reference measurement system of claim 1, wherein the optical coupler (5) is a faraday rotating coupler.
4. The vector network analyzer transmitted reference measurement system of claim 1, wherein the first mixer (6) is a subharmonic mixer.
5. The vector network analyzer transmitted reference measurement system of claim 1, wherein the second mixer (9) is a higher harmonic mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222387948.XU CN218272540U (en) | 2022-09-08 | 2022-09-08 | Emission reference measurement system of vector network analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222387948.XU CN218272540U (en) | 2022-09-08 | 2022-09-08 | Emission reference measurement system of vector network analyzer |
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| Publication Number | Publication Date |
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| CN218272540U true CN218272540U (en) | 2023-01-10 |
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| CN202222387948.XU Active CN218272540U (en) | 2022-09-08 | 2022-09-08 | Emission reference measurement system of vector network analyzer |
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- 2022-09-08 CN CN202222387948.XU patent/CN218272540U/en active Active
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